WO2022195406A1 - Die casting machine - Google Patents
Die casting machine Download PDFInfo
- Publication number
- WO2022195406A1 WO2022195406A1 PCT/IB2022/052093 IB2022052093W WO2022195406A1 WO 2022195406 A1 WO2022195406 A1 WO 2022195406A1 IB 2022052093 W IB2022052093 W IB 2022052093W WO 2022195406 A1 WO2022195406 A1 WO 2022195406A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- column
- fixed
- plane
- die
- shell
- Prior art date
Links
- 238000004512 die casting Methods 0.000 title claims abstract description 21
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/26—Mechanisms or devices for locking or opening dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
Definitions
- the present invention is in the field of die-casting machines, in particular for the die-casting of aluminum alloys and other metals, of the toggle or toggle-free type.
- the subject of the present invention is an innovative system for connecting the horizontal columns of the machine to the fixed plane. Summary of invention
- a die casting machine comprises a base having a predefined longitudinal extension, on which a first fixed vertical plane and a second fixed vertical plane, longitudinally spaced from the first one, are mounted. Moreover, the machine provides a movable vertical plane placed between the fixed planes, which are translatable longitudinally. [0003]The two fixed vertical planes are rigidly connected by horizontal columns and the movable plane is guided on the base and supported smoothly along the horizontal columns.
- the first fixed plane carries a first half-die (which is therefore a fixed half-die) and the moving plane carries a second half-die (movable half-die); the half-dies are composed of two complementary parts that together define an imprint of the part to be obtained by die-casting.
- the machine further comprises an injection unit for sending molten metal into the die when the two half-dies are coupled; the injection unit is supported by the base and placed in front of an outer face of the first fixed plane.
- the movement and clamping of the movable plane with the first fixed plane are usually carried out using two technologies: the first involves the use of a hydraulic cylinder for movement and a toggle system for clamping (machines with toggle); the second involves the use of a hydraulic cylinder for movement and clamping jaws that lock onto the columns, arranged behind the movable plane, for locking (toggle-free machines).
- the horizontal columns are threaded at both ends to rigidly attach them to the first fixed plane on one side and to the second fixed plane on the other side.
- the horizontal columns are threaded on one side to rigidly connect them to the first fixed plane and have a plurality of circumferential grooves in the central part onto which the clamping jaws engage. At the other end, the columns are either supported freely by the second fixed plane or clamped by means of a plate.
- connection between the horizontal columns and the first fixed plane is of enormous importance for the reliability of these machines, since said connection is subject to high and cyclic stresses.
- 2017/057142 show die-casting machines equipped with columns with shaped profiles. However, these machines have extremely complex coupling systems, which do not solve the problems of play between the coupled surfaces and do not ensure optimal column retention.
- the object of the present invention is to provide a particularly reliable and structurally simple die-casting machine, in particular with reference to the connection between the horizontal columns and the first fixed plane. This object is achieved by a die-casting machine according to claim 1.
- the dependent claims disclose further advantageous embodiments of the invention.
- FIG. 2 depicts a first end of a horizontal column according to the invention
- FIG. 3 is an enlargement of the box III in Fig. 2, showing an outline of a shaped section of the column;
- FIG. 4 depicts a device for connecting a column to a fixed plane of the machine, according to one embodiment of the invention
- FIG. 5 is a cross-sectional view of the connection device of Fig. 4;
- FIG. 6 is a cross-sectional view of a connection device, according to another embodiment of the invention
- FIG. 7 is a cross-sectional view of a connection device, according to yet another embodiment of the invention
- [0020]- Fig. 8 shows a toggle-free die-casting machine according to a further aspect of the present invention
- [0021]- Fig. 9 depicts a column from the machine in Fig. 8
- [0022]- Fig. 10 is an enlargement of the box X in Fig. 9, showing a profile of an intermediate section of the horizontal column.
- a die-casting machine with toggle comprises a base 2 extending longitudinally, a first fixed vertical plane 4, a second fixed vertical plane 6 spaced longitudinally from the first fixed plane 4, and a movable vertical plane 8 located between the fixed planes 4, 6 and horizontally translatable on command.
- the position of said second fixed plane is adjustable according to the height of the die.
- the two fixed planes 4, 6 are rigidly joined by horizontal columns 10, usually consisting of one-piece steel cylinders, extending longitudinally; the movable plane 8 is guided on the base 2 and supported slidingly by the horizontal columns 10 to make a longitudinal movement to and from the first fixed plane 4.
- An inner face 4a of the first fixed plane 4 carries a first half-die (or fixed half-die); an inner face 8a of the movable plane 8, facing the inner face 4a of the first fixed plane 4, carries a movable half-die.
- the two half-dies are made up of complementary parts which, when coupled, form a die, corresponding to the shape of the part to be obtained by die-casting.
- the machine 1 further comprises an injection unit 120 for sending molten metal into the imprint of the die when the die is closed.
- the machine 1 further comprises at least one hydraulic cylinder 30, for example arranged to pass through the second fixed plane 6, connected to the movable plane 8 for moving it longitudinally, and a toggle system 40, for example arranged between the second fixed plane 6 and the movable plane 8, for clamping the movable plane 8 in the engagement position with the first fixed plane 4, in which the die is closed.
- each horizontal column 10 extends longitudinally along a respective column axis X between a first end 10', secured to the first fixed plane 4, and a second end 10'', attached to the second fixed plane 6.
- the horizontal column 10 has a shaped section 12 for connecting to the first fixed plane 4.
- the shaped section 12 comprises a plurality of circumferential, radially projecting and axially spaced ribs 14 so as to form a respective groove 16 between two successive ribs.
- each groove 16 has a substantially trapezoidal profile 18.
- Said profile 18 has a first side 20 composed of a truncated cone surface coaxial to the column axis X, a groove bottom 22 composed of a cylindrical surface coaxial to the column axis X and a second side 24 composed of a further truncated cone surface coaxial to the column axis X, so that said sides 20, 24 are converging towards the column axis X.
- each side 20, 24 is inclined with respect to the direction transverse to the column axis X, i.e., the radial direction, by an angle between 6 degrees and 16 degrees, preferably between 8 degrees and 14 degrees, for example equal to 10 degrees (Figure 3).
- the first side 20 and the bottom of the groove 22 are connected in such a way as to avoid the formation of areas in which stresses may be concentrated, such as the bottom of the groove 22 and the second side 24.
- each rib 14 is delimited on the sides by a first side 20 and a second side 24 of the grooves 16 and at the top by a ridge 26 consisting of a cylindrical circular surface, coaxial to the column axis X.
- the ridge 26 is connected to the first side 20 and the second side 24.
- said first fixed plane 4 has a respective through hole 4c; the first end 10' of the column 10 is inserted into the hole 4c, so that the shaped section 12 protrudes externally.
- the machine 1 comprises, for each column 10, a connection device adapted to be rigidly coupled to the shaped section 12 of the column 10 projecting from the first fixed plane 4, thereby forming an abutment which opposes the extraction of the column 10 from the first fixed plane 4.
- the connection device is manually operated and comprises a shell 50, adapted to be rigidly coupled with form fitting to the shaped section 12 of the column 10.
- the shell 50 comprises two half-dies 50a, 50b, each in the form of a hollow half-cylinder, coupled to each other via a plurality of tangential screws 52 ( Figure 5).
- the connecting device comprises a main plate 54 that is abutted to the end 10' of the column 10 and the shell 50.
- said main plate 54 is attached by screws directly to the first fixed plane 4 via a plurality of first axial screws 56 and, further, secured to the shell 50 via a plurality of second axial screws 58.
- the shell 50 is not directly secured to the first fixed plane 4.
- the connecting device is hydraulically or pneumatically operated, and comprises a shell 50, adapted to be rigidly coupled with form fitting to the shaped section 12 of the column 10.
- the shell 50 consists of two half-shells 50a, 50b, which enclose the shaped section 12 like a jacket.
- the connecting device further comprises a main plate 54, which is applied in abutment to the end 10' of the column 10 and the shell 50.
- the main plate 54 is secured by screws 64 to the first end 10' of the column 10.
- the connecting device comprises at least one fluidly operable jaw 70 that is attached to the shell 50.
- Said jaw 70 has a pressure chamber 72 feedable with pressurized fluid and comprises at least one piston 74 operatively coupled to the respective pressure chamber 72 to be radially actuated and to operate in thrust on the respective half-shell 50a, 50b.
- a plurality of pistons 74 is provided, operating in radial opposition.
- the shaped section with ribs and grooves as described above is provided at the second end 10 of the column 10 for connecting the column 10 to the second fixed plane 6.
- the connecting device according to the embodiments described above actuates the connection between the second end 10' of the column 10 and the second fixed plane 6.
- a toggle-free die-casting machine 100 has structural and functional features similar to those of the machine with toggle described above but includes clamping jaws 122 for clamping the movable plane 8 in the engagement position with the first fixed plane 4 in which the die is closed.
- the clamping jaws 122 are supported by the movable plane 8 and in particular are applied to an outer face 8b of the movable plane 8; preferably, moreover, said clamping jaws 122 are actuated by means of actuators, for example hydraulic actuators.
- each horizontal column 110 extends longitudinally along a respective column axis X between a first end 110', secured to the first fixed plane 4, and a second end 110'', supported by the second fixed plane 6.
- the horizontal column 110 has a shaped section 112 made as described above for the shaped section 12 of the horizontal columns 10 of the machine with toggle 1.
- the connecting device operates to connect the first end 110' of the column 110 to the first fixed plane 4.
- each horizontal column 110 at an intermediate position between the first end 110' and the second end 110'', has an intermediate shaped section 114 on which the clamping jaws 122 are forcibly tightened to close the die by radial clamping.
- each intermediate shaped section 114 comprises a plurality of protruding, intermediate circumferential ribs 116 spaced longitudinally to form respective intermediate circumferential grooves 118.
- the shaped section with ribs and grooves as described above is provided at the second end 110'' of the column 110 for connecting the column 110 to the second fixed plane 6.
- the connecting device according to the embodiments described above actuates the connection between the second end 110' of the column 110 and the second fixed plane 6.
- the above-described invention meets the reliability requirements of the industry and overcomes the drawbacks discussed above, in that it is possible to make shaped sections with ribs and grooves that are much stronger than the threaded sections used in known solutions.
- the invention allows for a more simplified connection between the column and the fixed plane, since, unlike conventional columns with threads, it does not require the column to be phased. This is a significant advantage especially for automated applications wherein the half shells close by means of hydraulic cylinders.
- the grooves according to the invention are made by means of simpler machining operations than those required to make a thread; this allows tighter tolerances to be met, both for the shaped section of the column and for the corresponding region of the half-shells, drastically reducing the play between the coupled surfaces.
- the connecting device achieves effective column restraint.
- the circumferential ribs unload axial forces onto the half-shells, particularly through contact with the lateral sides. Consequently, the two half-shells are subject to thrusts in the radial direction, orthogonal to the column axis, which would tend to push them away from each other.
- said radial movements of the half-shells are prevented simply and effectively, further minimizing play.
- the profile of the grooves allows for a compromise to be reached between the dimensional and coupling tolerances of the half-shells and for the forces in the radial direction that are generated when the column is subjected to tensile loads to be minimized.
- high angles of inclination of the lateral sides of the ribs would result in radial thrusts that are too high; conversely, moderate angles of inclination would require particularly stringent dimensional and coupling tolerances between the half ⁇ shells and the shaped section.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/550,524 US20240189893A1 (en) | 2021-03-15 | 2022-03-09 | Die casting machine |
CN202280021545.3A CN117396286A (en) | 2021-03-15 | 2022-03-09 | Die casting machine |
EP22713734.6A EP4308323A1 (en) | 2021-03-15 | 2022-03-09 | Die casting machine |
JP2023556880A JP2024510474A (en) | 2021-03-15 | 2022-03-09 | die casting machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102021000006101A IT202100006101A1 (en) | 2021-03-15 | 2021-03-15 | DIE CASTING MACHINE |
IT102021000006101 | 2021-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022195406A1 true WO2022195406A1 (en) | 2022-09-22 |
Family
ID=76375430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2022/052093 WO2022195406A1 (en) | 2021-03-15 | 2022-03-09 | Die casting machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240189893A1 (en) |
EP (1) | EP4308323A1 (en) |
JP (1) | JP2024510474A (en) |
CN (1) | CN117396286A (en) |
IT (1) | IT202100006101A1 (en) |
WO (1) | WO2022195406A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3951579A (en) * | 1974-05-08 | 1976-04-20 | Koehring Company | Apparatus for facilitating access to the mold halves of a molding machine |
US4080144A (en) * | 1975-10-04 | 1978-03-21 | Karl Hehl | Tie rod structure for die closing unit of injection molding machine |
GB1537133A (en) * | 1975-02-11 | 1978-12-29 | Buehler Ag Geb | Injection moulding and die casting machines |
CN205310731U (en) * | 2015-09-30 | 2016-06-15 | 博创智能装备股份有限公司 | Clamping mechanism, injection moulding equipment, injection molding equipment |
US20170057142A1 (en) * | 2015-08-27 | 2017-03-02 | Nissei Plastic Industrial Co., Ltd. | Mold clamping apparatus |
-
2021
- 2021-03-15 IT IT102021000006101A patent/IT202100006101A1/en unknown
-
2022
- 2022-03-09 EP EP22713734.6A patent/EP4308323A1/en active Pending
- 2022-03-09 US US18/550,524 patent/US20240189893A1/en active Pending
- 2022-03-09 CN CN202280021545.3A patent/CN117396286A/en active Pending
- 2022-03-09 WO PCT/IB2022/052093 patent/WO2022195406A1/en active Application Filing
- 2022-03-09 JP JP2023556880A patent/JP2024510474A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3951579A (en) * | 1974-05-08 | 1976-04-20 | Koehring Company | Apparatus for facilitating access to the mold halves of a molding machine |
GB1537133A (en) * | 1975-02-11 | 1978-12-29 | Buehler Ag Geb | Injection moulding and die casting machines |
US4080144A (en) * | 1975-10-04 | 1978-03-21 | Karl Hehl | Tie rod structure for die closing unit of injection molding machine |
US20170057142A1 (en) * | 2015-08-27 | 2017-03-02 | Nissei Plastic Industrial Co., Ltd. | Mold clamping apparatus |
CN205310731U (en) * | 2015-09-30 | 2016-06-15 | 博创智能装备股份有限公司 | Clamping mechanism, injection moulding equipment, injection molding equipment |
Also Published As
Publication number | Publication date |
---|---|
CN117396286A (en) | 2024-01-12 |
JP2024510474A (en) | 2024-03-07 |
IT202100006101A1 (en) | 2022-09-15 |
US20240189893A1 (en) | 2024-06-13 |
EP4308323A1 (en) | 2024-01-24 |
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